Finding the Fourth Proportional to 1,090.43, 1,505.01 and 648.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,090.43 : 1,505.01 = 648.25 : x
2. Step 2: Convert to fraction form
   1,090.43/1,505.01 = 648.25/x
3. Step 3: Cross multiply
   1,090.43x = 1,505.01 × 648.25
4. Step 4: Simplify right side
   1,090.43x = 975,622.73
5. Step 5: Solve for x
   x = 975,622.73/1,090.43
6. Step 6: Final answer
   x = 894.71